8. A 2 kg flower pot weighing 20 N falls from a window ledge. How large must air resistance be in order that the pot fall
with an acceleration of 8 m/s2?

The force of the air resistance is 4 N.

The given parameters;

Let the air resistance = F

Apply Newton's second law of motion to determine the force of the air resistance acting upward to oppose the motion of the pot falling downwards.

Thus, the force of the air resistance is 4 N.

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when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27